Spring for choker valves



Oct. 9,1923. 1,47%,583

J. E. MESSENGER SPRING FOR CHOKER VALVES Filed uuly 9, 1923 E i in s, inwhich v um v a as r a. rear arsr JACK. E. HESEEHGER, F DES MOINES, IOWA.

SEEING FOP. CHUKER "ST AL'Q 'ES.

Application filed July 9, 1923. Serial No. 858,248.

To all whom it may concern:

8e it known I, duos E. MrssnNosn, a'citizen of the Uiiitcd States, and aresident of Des lt loines in the county of Polk l and tato of lows, haveinvented a certain new and useful Spring'ior Choker Valves, of which thefollowing is a speciheat-ion.

The object of my invention it to prowide a spring oi simple andinexpensive construction ior yieldingly holding open the choker valve ofthe carburetor on a Ford automobile.

Mor particularly, it is my object to provide such a spring, having itsparts so shaped, constructed and arranged that the spring may heinstalled on a carburetor without the use of screws or other iasteln ingmeans in such manner as to be held Eli Ford cars, and which will retainits posi so in lace by its own tension.

I tion and. perform its function when assembled on any of such'carbure'mrs. I

With these and other objects in view, my invention consists in theconstruction, ar 30 rangement and combination of the various parts or.my device, whereby the objects contemplated are attained, as hereinaftermore fully set forth, pointed out in my claim, and illustrated in theaccompanying drawigure 1 shows a sideelevation of a car buretor equippedwith a choker valve spring embodying my invention.

Figure 2 shows a top or plan view of thesarnc.

Figure 3 shows a side elevation oi thespring. Figure 4 shows a rearelevation of the spring. 1 a Figure 5 shows a top or plan view of aportion of carburetor illustrating the I spring partially installed inposition.

Figure 6 shows a similar view with the spring completely installed; and0 .Figure 7 shows a detail, sectional view taken on the line 77 ofFigure 6.

In the accompanying drawings, 1 have used the reference numeral 10 toindicate generally the body of a carburetor,- having the float chamber11 and having the latersage 15 in which is an ordinary butterfly valve16 shown for instance in dotted lines in Figure 6, having the stem 17rojecting through the wall of the passage. The valve 16 is the chokervalve.

Mounted on the stem 17 outside the pas- Y sage 15 is a hub or the like18 from which projects an arm 19 for controlling the choker valve.

In different forms and makes of carburetors used on Ford cars, the hub18 varies substantially in shape and size but in all installations ofwhich I am aware, there is some such hub and there is the choker valvewith its stem and an, arm 19 or its equivalent.

In the carburetors as made and originally installed, there is usuallyprovided a spring inside the hub 18, which is connected with the hub andwith the frame of the carburetor for yieldingly holding the choker valveopen.

These spring frequently become broken and it involves considerable laborand trouble and expense to replace them.

It has been my purpose in making my present-invention to devise a springof such shape that it could be installed from the outside withoutdisassernblinp the carburetor or parts thereof, and could be readily andquickly mounted on practically any carburetor now used on Ford cars.

For this purpose, I have brovided the spring device shown in thedrawings.

The spring, which I have indicated generally" at B comprises a shortspiral coil 20, one end of which, as at 21, extends in one directionfrom the lower part of the coil and the other end of which, as at 22,extends in substantially the opposite direc tion from the coil for ashort distance, as illustrated in Figure 5.

The at 21 of the spring terminates in a downward] opening hooked-shapedmenr her 23 eaten .ing away from the member :21 at substantiallya rightangle thereto and in the opposite direction from the coil 20. as shownin Figures 3, -3 5 and (i for instance.

The end or portion 22 has connected with it a portion 24 extending awayfrom the portion 22 and inclined outwardly therefrom, when the spring isin position tor installation as shown in Figure and terminating in aportion projecting; away from the portion 24: in position substantiallyparallel. with the extended axis of the portion 22, whereby the portionand the yoke 26, hereinafter mentioned are oil'set from the coil 20 andthe portion 22.

Assuming that the spring is viewed in side elev-ationin its position asshown for instance in Figure 7 and in Figure 3, it will be seen that theportion 25 terminates in a C-shaped receiving member or yoke 26 locatedabove the portion 25 and having the contracted neck 27.

The spring B is so constructed that when it is viewed from above in itsposition shown for instance in Figure 5, the portion 21 is extendednormally tangentially away from the coil portion 20 toward the left asshown and also in the direction, such that when the coil 20 is assembledon the hub 18, the portion 21 has to be sprung in a direction forWinding up the coil in order to fit the hook member 23 over tl e arm 19.

In different makes of carburetors used on Ford cars, the distance fromthe hub 18 to the lug 12 varies. It is also true that the distance ordegree of ofi'set between the point where the coil 20 is designed tostand and the point where the yoke 26 is designed to stand varies.

As result of these variations, it follows that there is a variation inditl'erent carburetors in the total distance between the coil 20 and theyoke 28 when installed.

It thus becomes necessary to provide a standard size of spring, whichcan be installed on any of the various makes of carburetors underconsideration. This is true, because it is desirable that the dealershall be required to keep on hand only one standard springinstead ofditlcrcntsprings for different carburetors.

The peculiar design ot my spring is such that it will fit any of thesemakes of carburetors. This result is zuzcomplishcd by the arrangement ofthe yoke 26 offset from the coil 20.

After the yoke. has been snapped on the portion (l, the spring issprungto slip the coil 20 over the hub lo to its position shown inFigures 6 and T, and thereafter the hook 23 is sprung over the arm 19.

Thereupon the spring will be held in posi tion by tension and the shapeof the spring is such that there is constant tension pressing the coil20 over the hub 18 toward the yoke 26 ordinarily presses against the lug12, as illustrated in Figure 6.

The peculiar shape of the portions 22, 24 and 25 of the spring is ofconsiderable importance in adapting the spring for convenient use withdifferent makes of carhuretors in which the distance from the portion Cto the wall A may vary and in which the distance from the portion C tothe hub 18 may vary.

By having the portions 2:2 and 25 arranged as shown in parallel planesand the inclined portion 24 connectino' them. it will be seen that ifthe distance oi the portion C and the hub 18 from the wall A varies, thespring may still be installed and will be installed with the yoke 26frictionally grip-. ping the nipple 13 and with the hook 223 on thearnr19 and with the coil 20 on the hub 18, with the coil 20 undertension pressing it toward the carburetor, regardless of variations inthe distance between the hub 18 and the nipple13 and regardless of thedistance of ofi'set between the hub 18 and the outer end of the lug 12.

in the actual installation of my improved spring B on the carburetor,the yoke 26 is slipped over the portion of the nipple 13 between theshonlder 11 and the lug 12 from the rear. That portion of the nipple 13is standard size, larger than the restricted neck 27 and of the size tobe snugly received within the yoke 26.

When the yoke 26 issnapped over the portion of the nipple 1-3 justmentioned, which is indicated for instance at C in Figure 6., it will beseen that the yoke 26 will he held against movement to the right or leftof its position shown for instance in Figure 5.

The tension of the yoke will prevent its being pulled rearwardly oil theportion C of the nipple 13.

The shoulder 14 and the end of the lug 1:2 prcvcn any movement of theyoke .26

inwardly or outwardly with relation to the carlnnrlor. ll'hcn the. yoke26 is placed in position on the-portion C, the shape of the spring issuch that the coil 20 stands just above the hub 18 and accomplishes itsfunction.

Similarly, if the hub 18 and the lug 12 are closer together 01' furtherapart in different makes oi carlnu-etors. still the spring having incnormal shape shown for instance in Figures 3 and 5 will always fit, willalways have tension pressing the coil 20 toward the wall A, and willalways frictionally engage the portions C and the arm 19 under tenslon.r

I performed a large number of experiments and made springs in a greatvariety of shapes and sizes before I was able to devise one which wasreadily adapted for use with the various structures of carburetors usedon Ford cars.

It will be noted that when the arm 19 is swung forwardly from itsposition shown for instance in Figure 7, for closing the choker valve,thecoil 20 is tightened and reduced in diameter and that there; is a"tendency to pull the portions 24 and 25 and the yoke 26 rearwardly.

On account of the reduced neck 27, however, I find that the spring willnot be pulled from theportion C.

It will be noted that the yoke 26 opens away ir-om the coil and that theportion 25 extends to the forward part of the yoke, I have found this anecessary construction in order to allow for installation on thedifferent carburetors mentioned and to. permit the tree movement of thearm 19 for closing the choker valve. If the yoke were made with its openend toward the coil, I find that the spring, wheninstalled on certaincarburetors, tightens up when the arm 19 is moved for closing the valveand prevents the full closing of the valve. 7

It will therefore be seen that I have provided a very simple andinexpensive spring structure which can be used for holding open undertension a choker valve in a variety of makes of carburetors.

It will be noted that I have provided a spring which will'retain itstension and its grip on the parts on which it is assembled regardless ofconsiderable variation of size and arrangement thereof and particularlyeven though there is variation in'the distance between the hub 18 andthe portion 26 from each other and in the relative distances from thewall A.

The spring can be mounted on any of the various makes of carburetorsused on Fords without the use of tools and will always remain firmly inplace under substantial tension. At the same time, the construction issuch that the arm 19 can be operatedfor increasing the tension of thespring without releasing it at either end or from the hub 18. The hub 18in most instances forms a formed thereon a yoke-shaped comprising a. Creslhent 0011 having one en progectmg tanntially away therefrom andterminating 1n Ehook extendin from said end in the op osite direction mmthe coil, the other on of the coil having a portion substantially offsetfrom a tangential line substantially as shown and tcrminat-ipg in ayokeshaped portion with a reduced-neck.

3. A choker valve spring comprising a, resilient coil having one endprojecting tangentially away therefrom and terminating in a hookextending from said end in the opposite direction from the coil, theother end. of the coil having a portion substantially ofiset froma.tangent1al line substan-- tially as shown and terminating in ayokeshaped portion with-a reduced neck, and a portion adapted tofrictionally engage an intake pipe.

4. A choker valve sprin iesilient coil having one en projectingtangentially away therefrom and terminating in a hook extending fromsaid'end in the opposite direction from the coil,.the' other end of thecoil having a portion substantially offset from a tangential'linesubstan-- tially as shown and terminating in a yokeshaped portion with areduced neck, opening away from the coil.

comprising a 5. A choker valve spring comprising a resilient cpil havingat one end a member for engaging an arm on a valve stem and having atits other end a portion offset from the coil terminating in ayoke-shaped portion opening away from the coil and having a reduced neckwith diverging ends.

6. A choker valve sprin comprising a resilient coil having one onprojecting tangentially away therefrom and terminating in a hookextending from said end in the opposite direction from the c0il,'theother end of the coil having a portion substantially offset from atangential line substantially as shown and terminating'in a yoke shapedportion with a reduced neck, 0 enin away from the coil, the yoke beingorme between the extreme end of the spring and the coil.

7 A choker valve spring comprising a resilient coil having at one end amember for anchoring the same to an arm on a valve stem, and having atits other end a portion offset from the coil terminating in ayokesha-ped portion, opening in a direction with relation to the coil toexert a thrust away from the coil, said yokershaped portion having areduced neck.

us i

with relation to the coil to exert a thrust away from the coil, saidanchoring member and said yoke-shaped portion being arranged 10 indifferent horizontal planes.

Des Moines, Iowa, April 18, 1923.

JACK E. MESSENGER.

